// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_APP_LIST_COCOA_APPS_SEARCH_RESULTS_MODEL_BRIDGE_H_
#define UI_APP_LIST_COCOA_APPS_SEARCH_RESULTS_MODEL_BRIDGE_H_

#include <stddef.h>

#include "base/mac/scoped_nsobject.h"
#include "base/macros.h"
#include "base/memory/scoped_vector.h"
#include "ui/base/models/list_model_observer.h"

@class NSMenu;
@class AppsSearchResultsController;

namespace app_list {

// Bridge observing the ListModel representing search results in the app list,
// and updating the NSTableView where they are displayed.
class AppsSearchResultsModelBridge : public ui::ListModelObserver {
public:
    explicit AppsSearchResultsModelBridge(
        AppsSearchResultsController* results_controller);
    ~AppsSearchResultsModelBridge() override;

    // Returns the context menu for the item at |index| in the search results
    // model. A menu will be generated if it hasn't been previously requested.
    NSMenu* MenuForItem(size_t index);

private:
    // Lightweight observer to react to icon updates on individual results.
    class ItemObserver;

    void UpdateItemObservers();
    void ReloadDataForItems(size_t start, size_t count) const;

    // Overridden from ui::ListModelObserver:
    void ListItemsAdded(size_t start, size_t count) override;
    void ListItemsRemoved(size_t start, size_t count) override;
    void ListItemMoved(size_t index, size_t target_index) override;
    void ListItemsChanged(size_t start, size_t count) override;

    AppsSearchResultsController* parent_; // Weak. Owns us.
    ScopedVector<ItemObserver> item_observers_;

    DISALLOW_COPY_AND_ASSIGN(AppsSearchResultsModelBridge);
};

} // namespace app_list

#endif // UI_APP_LIST_COCOA_APPS_SEARCH_RESULTS_MODEL_BRIDGE_H_
